., that means from eastern texas, crossing up through michigan. or possibly just south of florida. >> it's just not under control at all. and that makes it very difficult to predict where it's going to come down. >> reporter: space junk falling out of the sky is more common that you might imagine. it's been raining down on us for 50 years. from the piece of sputnik iv that landed in wisconsin, to parts of a cosmos rocket that landed in kansas, texas and oklahoma. even part of a booster rocket that landed in wyoming this past march. the best-known space litter is skylab, which fell into western australia in 1979. but in 1997, a fragment of material from a delta rocket actually landed on a person. lottie may williams, while she was out for a walk in tulsa, oklahoma. >> i started running. then, as i took off, it hit the ground. and it sounded metallic. >> reporter: she may have been surprised. but she wasn't hurt. so, what advice does the only known victim of falling space junk have for the rest of us? >> my advice is to be outside. if you see it com